Please use this identifier to cite or link to this item: http://hdl.handle.net/1/4344
Title: The Role and Effectiveness of Refuge Crops in Bt Cotton Production, to Reduce Helicoverpa Armigera and Helicoverpa Punctigera Numbers for Resistance Management.
Authors: Tan, William
Keywords: australian
cotton
industry
Bt
toxin
Helicoverpa
punctigera
armigera
Bollgard III
researchers
farm
capacity
viability
biotechnologies
stewardship
knowledge
extension
resistance
management strategies
Issue Date: 30-Jun-2013
Publisher: University of Sydney
Series/Report no.: ;CSE1307
;CRC 5.10.03.31
Abstract: ‘Assuring industry capacity to manage the stewardship of biotechnologies and crop protection products’, is a key tactic within the CRDC’s 2012-12 Annual Operating Plan. Refuges are key to maintaining the viability of Bt cotton by delaying resistance development in Helicoverpa to Bt toxin. However, to ensure the best resistant management strategies are in place for Bollgard III, researchers need to confirm refuge assumptions. In a previous summer Scholarship (CRC 5.10.03.31 SS) refuge assumptions were tested, finding 1) no difference on commercial farms in the number of eggs laid on pigeon pea and cotton refuges; and 2) that more moths were produced from cotton refuges. Because these results are controversial, the researcher proposes to repeat the study, but include additional measurements of nitrogen and moisture content of the refuge crop, as laboratory results indicate that these parameters affect refuge attractiveness and productivity. The aim of this project is to clarify the findings of relative attractiveness and productivity of commercially grown cotton and pigeon pea refuges. This data will enable the researcher to quantify refuge productivity. The research strategy behind this project will involve sampling refuges on approximately 20 farms, with the direct involvement of growers to this project leading to an increased ownership and acknowledgement of the results on their individual farms. This Summer Scholarship was instigated following a previous similar study that found no difference in either the number of eggs laid (attractiveness) or moth produced (productivity), between pigeon pea and cotton on commercial farms. This project found that pigeon pea refuges were twice as attractive and productive as the cotton refuges. It also highlighted the importance of management, as the most attractive life cycle stage for pigeon pea was with pods while flowering.
URI: http://hdl.handle.net/1/4344
Appears in Collections:2013 Final Reports

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